Tukukkk

I follow guide from http://filterrific.clearcove.ca. I try to add into my app filterrifc gem for sort, but its doesnt work. I dont understand why. I will be grateful for any help.
My model:

  filterrific(

     default_filter_params: { sorted_by: 'created_at_desc' },

     available_filters: [

        :sorted_by,

        :with_title,

        :with_spec,

        :with_created_at_gte

    ]

    )



belongs_to :user



scope :sorted_by, lambda { |sort_option|

    direction = (sort_option =~ /desc$/) ? 'desc' : 'asc'

    case sort_option.to_s

    when /^created_at_/

        order("post.created_at #{ direction }")

    when /^title_/

        order("LOWER(post.title) #{ direction }")

    when /^spec/

        order("LOWER(post.spec) #{ direction }")

    else

        raise(ArgumentError, "Invalid sort option: #{ sort_option.inspect }")

    end

}



    scope :with_title, lambda { |titles|

        where(:title => [*titles])

    }   

    scope :with_spec, lambda { |specs|

        where(:spec => [*specs])

    }

    scope :with_created_at, lambda { |ref_date|

        where('post.created_at => ?', Data.strptime(ref_date, "%m/%d/%Y"))

    }



    def self.options_for_sorted_by

        [

            ['title (a-z)', 'title_asc'],

            ['title (z-a)', 'title_desc'],

            ['Created date (newest first)', 'created_at_desc'],

            ['Created date (oldest first)', 'created_at_asc'],

            ['spec (0-9)', 'spec_asc'],

            ['spec (9-0)', 'spec_desc'],

        ]

My controller
def show
@user = User.find(params[:id])

    @filterrific = initialize_filterrific(

        @user.posts,

        params[:filterrific],

        select_options: {

            sorted_by: @user.posts.options_for_sorted_by },

            persistence_id: 'shared_key',

            default_filter_params: {},

            available_filters: [:sorted_by, :with_title, :with_spec, :with_created_at],

            sanitize_params: false

            ) or return

    @posts = @filterrific.find.page(params[:page])

# Respond to html for initial page load and to js for AJAX filter updates.

respond_to do |format|

    format.html

    format.js

end



rescue ActiveRecord::RecordNotFound => e

    puts "Had to reset filterrific params: #{ e.message }"

    redirect_to(reset_filterrific_url(format: :html)) and return

end



And my view table:



<div id="filterrific_results">

<table class="table table-striped table-bordered table-list">

 <thead>

  <tr>

   <th><%= filterrific_sorting_link(@filterrific, :title) %></th>

   <th><%= filterrific_sorting_link(@filterrific, :spec) %></th>

   <th>Tags</th>

   <th><%= filterrific_sorting_link(@filterrific, :created_at) %></th>

  </tr>

 </thead>



 <tbody id="myTable">

  <% @user.posts.each do |post| %>

   <tr>

    <td><%= post.title %></td>

    <td><%= post.spec %></td>

    <td><% post.tag_list.each do |tag| %>

     <a class="badge badge-info"><%= tag %></a>

    <% end %>

    </td>

     ...

   </tbody>

</table>

</div>

At the terminal all works right, without any mistakes or exceptions